duozhasht

hey there @Azimoth, previously, i've also had that WHEA errors, but those don't indicate a CPU failing , but rather general hardware problems. Those are actually "processor machine check exceptions" which can be caused by faulty rams, overheating problems, IO device errors such as PCI-E interrupt port errors and so on ...

That could very much be the problem!! Tomorrow I'll be posting photos of my specific case, which was a little different. But basically i was "hiding" the cable from the CPU fan between the heat sink and the cooler, without noticing that it was touching some capacitors. The cable would heat up because it was touching the radiator and maybe passing heat to the capacitors. Overheating causes capacitor failing which can cause random freezes and reboots. We ll keep in touch and I ll report if the stability persists! Also, maybe other people can help with their opinions on the topic

Sorry for the long post hope this helps in some away.. I was about to send back the computer with all the boxes to the retailer shop where i bought the parts from, to see if they could help me with it, otherwise i would be returning every component and go with a intel/nvidia solution. On the process of making the best assemble possible so they couldn't argue on bad usage/assembly (i actually always do that as a precaution, i took photos of everything so they couldn't accuse of bending MOBO pins, damaging a CPU and etc's) i ve fixed the problem. Hope this bits helps. Since the GPU works fine in your brothers machine, i would try to do the same. If u want, post some pictures of your case (front & back) and see if the community can help in any aspect.

@Lefy8880 do you ended up discovering your problem? It might be a little early too celebrate it, but i think i might found a solution. First of all, your post was one of the most completes I've found approaching this problem. I've found myself troubleshooting this problem over the course of 2 weeks already, I've built a new computer on the past week (6th June to be more precise). My specs are very similar to yours: (not quite equal but in terms of architecture and power consumption they are) CPU: AMD Ryzen 7 3700X (With the stock cooler) GPU: MSI RX 5700 Mecha OC GP 8GB GDDR6 MOBO: MSI B450-A PRO MAX (Latest stable bios) RAM: GSKILL Aegis 2x16GB - 3200Mhz PSU: Seasonic Focus GX-650, 650W 80+ Gold, Full-Modular DISK: SSD M2 Western Digital Blue SN550 NVMe My symptoms are (or at least were i hope) very similar to yours. I could be gaming, browsing and even working with the computer for 4-5 hours and then it would restart/reboot automatically without any warning. I would get around 1 to 2 restarts per day. Just like I've seen everywhere, opening up the Event Viewer or the Reliability History the only critical errors i would get would be kernel power issues (which are very generic) and RadeonSoftware.exe application crashes. I've tried all the possible solutions I could find around forums/reddit or others: - disable hardware acceleration in browsers; - turning off all settings from Wattman/Radeon Software; - underclocking/volting the GPU - using 2 distinct PCI-E cables instead of a master/slave cable - different driver versions, windows versions, windows parameters with DDU and AMD software to remove old ones - windows clean install Trust me i've tried ANYTHING possible, u name it. Some solutions would get me more time between random restarts, but i really think it was because they were lowering the power consumption from the card. I've tried hardware solutions just like yours, I've taken out the PSU (my case is a bit odd/smalish for atx form factor, and PSU is vertically mounted) so i mounted it outside the case, re-done all the cables and all that stuff. I've actually never tried another PSU cause the alternatives i had, had less power/watts. I've also tried a different Nvidia card which would work fine, but it's power usage was way lower than RX 5700. I've also done temps monitoring, stress tests with Aida64, OCCT, Prime95, Ungine (different tests), FurMark. Test could run for HOURS without crashing or rebooting. I would stop the test, open a game like Valorant or Destiny 2 and boom. Black screen, fans went off, reboot. My last approach, was to re-do all cables, like from scratch. Every ... Single ... Cable... I've pictures of before and previous. Mounted again the GPU. I've also removed drivers, and installed AMD Enterprise drivers (although I've tried those previously). I can haply say that I'm restart free since Tuesday. I have an uptime (with sleeps of the computer between) of over 3 days. I've actually rebooted the system today just to be sure it would sustain and so far so good. I hope I'm not making jinxs on the subject. TLDR: tried out every solution, i think the problem was actually the CPU fan/cooler cable which was hidden near the heatsink and was also touching one or two capacitors. Dunno if because of some overheating or even grounding reasons, that could be causing randomly restarts. That with the Enterprise drivers version has got me at least some stability.